Bilge pump

[tomxdana]

Was looking to replace bilge pump and was looking for any advice. Trophy 1802 year 2002. Previous owner removed screen I guess so he didn't have to clean it. I hope that is not usual practice.
Manual says that it comes with a 1000 gpm but there is only a Rule 800gpm in there. Any opinions on a good pump. I was looking at 1100gpm but I think the hose size would be different but I have to check to be sure. The Rule looks like it uses 3/4" and the pumps I was looking at uses 1 1/8".

Tom

 

[tashasdaddy]

Re: Bilge pump

what size is the thru hull fitting? that's what you need to go with. if boating off shore, or big water i recommend 2 independent pumps.

 

[tomxdana]

Re: Bilge pump

Would you drill a second thru hull fitting or just tee into the original? Would you use separate switches?

Thanks again,
Tom

 

[wildmaninal]

Re: Bilge pump

I'm not for sure that you could adapt say if your through hull hole is 3/4" you might be able to adapt from 1 1/8" to 3/4" using certain types of fittings. The switch would depend on if it's a 3 wire pump or 2 wire pump.

 

[rob711]

Re: Bilge pump

tom i have the same boat except its a 2005..there is 2 pumps in mine..one in the bilge accesed only by the 6inch deck plate at the rear of the boat...the other is in the cabin on the floor...at least on mine u can get to that one by lifting the small step like thing when u first enter the cabin...directly across from where the porta potti goes....
rob

 

[Nandy]

Re: Bilge pump

When you have 2 pumps the general recomendations are they should be in separate switches and at different levels. The lowest rate pump should be in the lower level of the hull. You can wire it to work by a float switch or float switch and a manual switch. The largest pump should be higher in the hull and generally is manually operated from a switch in the deck.
My pump is set up with a 3 way switch where I can leave it in auto, which means it will start by itself by the way of the float switch, if I set it in on, it will start regardles of the float swtich, finally, if I have it in off it will never run. I only use that off if I were to be working on it.

 

[Silvertip]

Re: Bilge pump

You also do not want to restrict the larger pump by reducing the 1-1/8 output line to 3/4. Defeats the purpose of the larger pump. Bilge pumps are "volume" pumps and as such the through-hull fitting should be 1-1/8" so the pump can move the amount of water it's designed to move. If you insist on outlet reduction you might as well buy the smaller pump as it will move as much water as the restricted larger pump.

 

[Gary H NC]

Re: Bilge pump

Most all of the 1100gph or higher use the 1 1/8th hose. No big deal to change the thru hull fitting if you can access it from the inside.

 

[tashasdaddy]

Re: Bilge pump

whe i say independently, totally, different battery, thru hull, wiring, switch. the idea is to have a backup. i run a 3 wire (auto/manual), and a 2 wire pump (manual).

 

[Nandy]

Re: Bilge pump

whe i say independently, totally, different battery, thru hull, wiring, switch. the idea is to have a backup. i run a 3 wire (auto/manual), and a 2 wire pump (manual).

YUP! pumps are meant to have redundancy. The only way to do that if ran it all separate. If you have 2 batteries much better.
Believe me, after you start making water by means of a leak of waves those pumps are the only thing keeping your vessel from becoming a sub. Not a nice experience.

 

[Bluefish]

Re: Bilge pump

Would you drill a second thru hull fitting or just tee into the original? Would you use separate switches?

Thanks again,
Tom

Install a second discharge line if you tee off the one you could just pump back into the boat thru second pump and try too make discharge lines as short as possible your gpm is always less than stated on pump because of length and height

 

[tcfishing]

Re: Bilge pump

Sorry, new to this forum.
Not sure if this is going in right.
I have a question. Just bought a new 2005 Corsair Catamaran Foiler, it's a fishing boat.
Have always had single hull boats. The boat comes with a Bilge pump in each hull. If you can believe it? Rule 500's. My question is? For some reason if 1 goes on in the automatic mode. The other goes on too. Even if no water in the other hull. One impeller is already burned out. There is only one switch for controlling the pumps. It rocks between auto and manual. Any ideas how to correct this? I want the pumps to go on only when needed in auto. Only one side or the other.

Any ideas would help
Thanks
Tom

 

[tashasdaddy]

Re: Bilge pump

tcfishing, not polite to jump threads, you have your answers in your thread.

 

[reelfishin]

Re: Bilge pump

I would want separate control over each pump, and separate fuses as well. I would also want to be able to test each pump individually.
It would mean adding a second switch and some minor wiring.
Depending on the size of the pumps, I would want to run them though a pair of relays as well. This would prevent any wiring problems due to higher amperage pump motors. Fuse amperage would have to be determined by the size of the pump motor and relay circuit. The use of relays will also eliminate the need to run a heavier gauge wire from the switch to the bilge pump motor.